I'd propose to drop the "command substitution" $( ... ) as it's not needed in above construct.
If you have all target lines in a file, and you are sure they occur not more than once in the large file, you could try
To allow for duplicates of target lines, try $(grep -owf targetlines 1000linesfile | sort -u | wc -l) in the if construct above.
Hello,
I need to select the 3 lines above as well as below a search string, including the search string.
I have been trying various combinations using sed command without any success.
Can anuone help please.
Thanking (2 Replies)
I'm trying to count the number of 2 specific characters in a very large file. I'd like to avoid using gsub because its taking too long.
I was thinking something like:
awk '-F' { t += NF - 1 } END {print t}' infile > outfile
which isn't working
Any ideas would be great. (3 Replies)
Hey All
Can any one please suggest the procedure to search a part of line in a very large file in which log entries are entered with very high speed.
i have trued with grep and egrep
grep 'text text text' <file-name>
egrep 'text text text' <file-name>
here 'text text text' is... (4 Replies)
are there any basic commands that can display lines 99 - 101 of the /etc/passwd file?
I'm thinking use of head and tail, but I forget what numbers to use and where to put /etc/passwd in the command. (2 Replies)
Hi guys,
i have a really big file, and i want to remove a specific line.
sed -i '5d' fileThis doesn't really work, it takes a lot of time...
The whole script is supposed to remove every word containing less than 5 characters and currently looks like this:
#!/bin/bash
line="1"... (2 Replies)
I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it.
For example, Here is a portion of a zone file.
IN NS ns1.domain.tld.
IN NS ns2.domain.tld.
IN ... (2 Replies)
testfile.csv
0","1125209",,"689202CBx18888",,"49",,,"NONMC",,,,,"01112010",,,,,,,"MTM-
"1","",,"689202ABx19005",,"49",,,"NONMC",,,,,"01072010",,,,,,,"MTM-
testfile.csv looks like above format
if the second column is null then get 23rd column and store in a different varible .. add all the... (1 Reply)
This could be a really dummy question.
I have a log text file.
What unix command to extract line from specific string to another specific string.
Is it something similar to?:
more +/"string" file_name
Thanks (4 Replies)
Hello,
I have a relatively large text file (25,000K) consisting of records of data. For each record, I need to create a new line based on what is already there.
Every record has a block that looks like,
M END
> <ID>
1
> <SOURCE>
KEGG
> <SOURCE_ID>
C00002
> <NAME>
ATP;... (4 Replies)
I am trying to make my script as simple as a possible but, I am not sure if the way I am approaching is necessarily the most efficient or effective it can be. What I am mainly trying to fix is a for loop to remove a string from the specified files and within this loop I am trying to copy the lines... (2 Replies)
Discussion started by: Allie_gastrator
2 Replies
LEARN ABOUT V7
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)